Skip the auto shop - Our mechanics make house calls
  1. Home
  2. Articles
  3. P0525 OBD-II Trouble Code: Cruise Control Servo Control Circuit Range/Performance

P0525 OBD-II Trouble Code: Cruise Control Servo Control Circuit Range/Performance

Check Engine Light P0525 OBD-II Trouble Code: Cruise Control Servo Control Circuit Range/Performance

Diagnostic Trouble Code (DTC): P0525

P0525 code definition

The P0525 code indicates that the PCM has detected a malfunction in the cruise control servo control circuit.

What the P0525 code means

The PCM is part of the system that assists the cruise control in controlling vehicle speed. If the PCM detects an issue with the cruise control based on the voltage reading from the servo control circuit, it will run a self-instituted test of the system. If there is an abnormal result for the voltage/resistance level within the cruise control servo control circuit, it will store this code.

What causes the P0525 code?

The most likely cause of an abnormal voltage/resistance level in the cruise control servo control circuit is a failed servo control unit.

Other causes may include:

  • Short circuits or open circuits in the cruise control buttons, due to spilled liquid or debris.
  • Shorted or open wiring, connectors, harnesses, or other damaged electrical components.
  • Blown fuses, which may indicate a more serious issue.

What are the symptoms of the P0525 code?

In most cases, the cruise control will stop working when the P0525 code is present. The Check Engine Light will illuminate within two to three drive cycles after the PCM has detected the issue.

How does a mechanic diagnose the P0525 code?

After an OBD-II scanner detects the P0525 code, a technician should begin with a visual inspection of all the wiring, connectors, and other components of the cruise control system. After repairing any issues, or replacing any damaged elements, they should then clear the code and perform a test drive, checking that the cruise control works as it should, and that the code does not reappear.

Common mistakes when diagnosing the P0525 code

The most common mistake made when diagnosing the P0525 code is to neglect to check for blown fuses. If a part is replaced, but a blown fuse is not repaired, it could cause the replacement part to fail very quickly.

How serious is the P0525 code?

If the P0525 code is being detected, a vehicle will still be drivable. The cruise control may not be usable, but this should not affect any other function of the vehicle. However, if a fuse is blown, there may be some electrical issues, such as the inability to use the turn signal, which could make the vehicle unsafe to operate. With this code stored in the PCM, the vehicle may be unable to pass an emissions test.

What repairs can fix the P0525 code?

There are many ways that a technician can address a P0525 code detection. They include:

  • Replacing a failed servo control unit.
  • Replacing damaged cruise control buttons.
  • Replacing shorted or open wiring, connectors, harnesses, or other damaged electrical components.
  • Replacing blown fuses.

Need help with a P0525 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.


More related articles

Veteran and Military Driver Laws and Benefits in Idaho
The state of Idaho offers a number of benefits and perks for those Americans who have either served in an Armed Forces branch in the...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2159 OBD-II Trouble Code: Vehicle Speed Sensor B Range/Performance
Diagnostic Trouble Code (DTC): P2159 P2159 code definition Vehicle Speed Sensor B Range/Performance...

Related questions

Q: Code P0303 cylinder 3 misfire

The symptoms you describe along with the blinking Check Engine Light and P0303 trouble code definitely tell us that you have a misfire in cylinder number 3. Your engine uses a coil on plug system. This means each individual...

Q: Check Engine Light is on - 2009 Chevrolet Malibu

If you have codes to a sensor, it does not always mean the sensor is bad. There may be wiring or connector problems causing erratic or incorrect sensor input to the computer. The code stored in a computer is only...

Q: How do I replace the airflow sensor on my 1985 olds 98

You definitely want to reset the computer when you make a repair like this. Resetting the computer will allow it to check the new component for proper operation and set a Diagnostic Trouble Code if there is still a problem....